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From: Javier Carrasco <javier.carrasco.cruz@gmail.com>
To: Chun-Kuang Hu <chunkuang.hu@kernel.org>,
	 Philipp Zabel <p.zabel@pengutronix.de>,
	David Airlie <airlied@gmail.com>,
	 Simona Vetter <simona@ffwll.ch>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	 AngeloGioacchino Del Regno
	<angelogioacchino.delregno@collabora.com>,
	 Alexandre Mergnat <amergnat@baylibre.com>,
	CK Hu <ck.hu@mediatek.com>,
	 "Jason-JH.Lin" <jason-jh.lin@mediatek.com>
Cc: dri-devel@lists.freedesktop.org,
	linux-mediatek@lists.infradead.org,
	 linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	 Javier Carrasco <javier.carrasco.cruz@gmail.com>
Subject: [PATCH 2/2] drm/mediatek: Switch to for_each_child_of_node_scoped()
Date: Fri, 11 Oct 2024 21:21:52 +0200	[thread overview]
Message-ID: <20241011-mtk_drm_drv_memleak-v1-2-2b40c74c8d75@gmail.com> (raw)
In-Reply-To: <20241011-mtk_drm_drv_memleak-v1-0-2b40c74c8d75@gmail.com>

Introduce the scoped variant of the loop to automatically release the
child node when it goes out of scope, which is more robust than the
non-scoped variant, and accounts for new early exits that could be added
in the future.

Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
---
 drivers/gpu/drm/mediatek/mtk_drm_drv.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index 0878df832859..9ab656b10a49 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -372,12 +372,11 @@ static bool mtk_drm_get_all_drm_priv(struct device *dev)
 	struct mtk_drm_private *temp_drm_priv;
 	struct device_node *phandle = dev->parent->of_node;
 	const struct of_device_id *of_id;
-	struct device_node *node;
 	struct device *drm_dev;
 	unsigned int cnt = 0;
 	int i, j;
 
-	for_each_child_of_node(phandle->parent, node) {
+	for_each_child_of_node_scoped(phandle->parent, node) {
 		struct platform_device *pdev;
 
 		of_id = of_match_node(mtk_drm_of_ids, node);
@@ -406,10 +405,8 @@ static bool mtk_drm_get_all_drm_priv(struct device *dev)
 		if (temp_drm_priv->mtk_drm_bound)
 			cnt++;
 
-		if (cnt == MAX_CRTC) {
-			of_node_put(node);
+		if (cnt == MAX_CRTC)
 			break;
-		}
 	}
 
 	if (drm_priv->data->mmsys_dev_num == cnt) {

-- 
2.43.0



  parent reply	other threads:[~2024-10-11 19:26 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-10-11 19:21 [PATCH 0/2] drm/mediatek: Fix child node refcount handling and use scoped macro Javier Carrasco
2024-10-11 19:21 ` [PATCH 1/2] drm/mediatek: Fix child node refcount handling in early exit Javier Carrasco
2024-10-23  2:49   ` CK Hu (胡俊光)
2024-10-28  7:00   ` Chen-Yu Tsai
2024-10-28  9:09   ` AngeloGioacchino Del Regno
2024-10-11 19:21 ` Javier Carrasco [this message]
2024-10-23  2:50   ` [PATCH 2/2] drm/mediatek: Switch to for_each_child_of_node_scoped() CK Hu (胡俊光)
2024-10-28  7:00   ` Chen-Yu Tsai
2024-10-28  9:09   ` AngeloGioacchino Del Regno
2024-11-04 12:39 ` [PATCH 0/2] drm/mediatek: Fix child node refcount handling and use scoped macro Chun-Kuang Hu

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